Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9650d84e344238ed7a3cb311b469fa0d31d3ed00af9ac71ec925ff32ca4ad8d0' 
  AND token = 'baQZ81wrQiA1m7D5j75ZBDHX4knKzFaCSzCI/3joRt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}